Display panel and method of fabricating the same

ABSTRACT

A display panel includes a first display substrate, a second display substrate facing and spaced apart from the first display substrate, a non-conductive sealing member disposed between the first display substrate and the second display substrate and formed around an outer perimeter of the display panel, a conductive sealing member disposed inside the non-conductive sealing member when viewed in a plan view, and a connection pad coupled to a side surface of the first display substrate and a side surface of the non-conductive sealing member. A signal line includes an end portion overlapping with the non-conductive sealing member and connected to the connection pad.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of U.S. patentapplication Ser. No. 16/236,648 filed on Dec. 31, 2018, which claimspriority to Korean Patent Application No. 10-2018-0000385, filed on Jan.2, 2018, and all the benefits accruing therefrom under 35 U.S.C. § 119,the content of which in its entirety is herein incorporated byreference.

BACKGROUND 1. Field

Embodiments of the invention relate to a display panel and a method offabricating the same and, more particularly, to a display panel having astrong structure and a method of fabricating the same.

2. Description of the Related Art

Generally, a display panel may be fabricated, and then, a circuit boardmay be connected to the display panel. For example, in a tape automatedbonding (TAB) mounting method, the circuit board may be bonded to thedisplay panel by using an anisotropic conductive film (ACF).

Recently, display panel designing techniques for reducing a bezel area(or a non-display area) have been variously studied.

SUMMARY

Embodiments of the invention may provide a display panel capable ofimproving electrical connection characteristics between a circuit boardand a signal line.

Embodiments of the invention may also provide a method of fabricating adisplay panel having a strong structure.

In an aspect of the invention, a display panel may include a firstdisplay substrate, a second display substrate facing and spaced apartfrom the first display substrate, a non-conductive sealing memberdisposed between the first display substrate and the second displaysubstrate, a conductive sealing member disposed between the firstdisplay substrate and the second display substrate and disposed insidethe non-conductive sealing member when viewed in a plan view, and aconnection pad coupled to a side surface of the first display substrateand a side surface of the non-conductive sealing member.

The first display substrate may include a first base substrate, a thinfilm transistor disposed on the first base substrate, at least oneinsulating layer disposed on the first base substrate, a pixel electrodedisposed on the first base substrate and connected to the thin filmtransistor, a signal line disposed on the first base substrate, and avoltage supply line disposed on the first base substrate and connectedto the conductive sealing member. The signal line may include an endportion overlapping with the non-conductive sealing member and connectedto the connection pad.

The non-conductive sealing member may include a first synthetic resinand first inorganic fillers mixed with the first synthetic resin.

The conductive sealing member may include a second synthetic resin andconductive particles mixed with the second synthetic resin.

The conductive sealing member may further include second inorganicfillers mixed with the second synthetic resin.

A diameter of the conductive particles may be less than a diameter ofthe first inorganic fillers.

The side surface of the non-conductive sealing member may besubstantially aligned with a side surface of the first base substrate.

A side surface of the end portion of the signal line may besubstantially aligned with a side surface of the first base substrate.

The second display substrate may include a second base substrate and acommon electrode disposed on one surface of the second base substrate.The non-conductive sealing member and the conductive sealing member maybe connected to the common electrode.

The thin film transistor may include a control electrode, an activepart, and an input electrode and an output electrode disposed on a layerdifferent from a layer on which the control electrode is disposed. Thevoltage supply line may be disposed on the same layer as the controlelectrode or the input electrode.

The display panel may further include an auxiliary electrode overlappingwith the end portion of the signal line. The signal line may be disposedon the same layer as the control electrode.

The auxiliary electrode may be disposed on the same layer as the inputelectrode.

The auxiliary electrode may be connected to the end portion of thesignal line.

The insulating layer may include a plurality of color filters. One ofthe color filters may overlap with the pixel electrode.

The insulating layer may further include a first inorganic layerdisposed under the plurality of color filters, and a second inorganiclayer disposed on the plurality of color filters.

Another of the plurality of color filters may overlap with at least oneof the non-conductive sealing member or the conductive sealing member.

A thickness of the end portion of the signal line may be greater than athickness of the signal line not overlapping with the non-conductivesealing member.

The end portion of the signal line may be spaced apart from a topsurface of the first base substrate.

Conductive sludge may be disposed between the end portion of the signalline and a portion of the top surface of the first base substrate, fromwhich the end portion of the signal line is spaced apart.

At least one of the non-conductive sealing member or the conductivesealing member may form a closed perimeter around the display panel whenviewed in a plan view.

In another aspect of the invention, a display panel may include a firstdisplay substrate, a second display substrate facing and spaced apartfrom the first display substrate, a non-conductive sealing memberdisposed between the first display substrate and the second displaysubstrate, and a connection pad coupled to a side surface of the firstdisplay substrate and a side surface of the non-conductive sealingmember.

The first display substrate may include a first base substrate includinga side surface substantially aligned with the side surface of thenon-conductive sealing member, a signal line disposed on a top surfaceof the first base substrate and including an end portion overlappingwith the non-conductive sealing member and connected to the connectionpad, and an auxiliary electrode connected to the end portion of thesignal line and the connection pad.

The second display substrate may include a second base substrate, and acommon electrode disposed on a bottom surface of the second basesubstrate and overlapping with the non-conductive sealing member.

In still another aspect, a method of fabricating a display panel mayinclude providing a first work display substrate including first cellareas and a first boundary area dividing the first cell areas, providinga second work display substrate including second cell areascorresponding to the first cell areas and a second boundary areacorresponding to the first boundary area, forming a first sealing memberand a second sealing member in each of the first cell areas, providing aliquid crystal material to each of the second cell areas, coupling thefirst work display substrate and the second work display substrate toform a work display panel, cutting the work display panel along thefirst boundary area to separate a preliminary display panel from thework display panel, grinding a side surface of the preliminary displaypanel, and forming a connection pad on the side surface of thepreliminary display panel. The second sealing member may be disposedinside the first sealing member when viewed in a plan view. A height ofthe first sealing member may be greater than a height of the secondsealing member.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects and features of the present invention willbecome more apparent by describing in further detail exemplaryembodiments thereof with reference to the accompanying drawings, inwhich:

FIG. 1 is a perspective view illustrating a display device according toan embodiment of the invention;

FIG. 2 is a plan view illustrating a display device according to anembodiment of the invention;

FIG. 3 is an equivalent circuit diagram of a pixel according to anembodiment of the invention;

FIG. 4 is a perspective view illustrating a display area of a displaypanel according to an embodiment of the invention;

FIGS. 5A to 5C are cross-sectional views illustrating display areas ofdisplay panels according to some embodiments of the invention;

FIG. 6A is a plan view illustrating a display panel according to anembodiment of the invention;

FIG. 6B is a perspective view illustrating a pad area according to anembodiment of the invention;

FIG. 6C is a cross-sectional view illustrating a pad area according toan embodiment of the invention;

FIG. 6D is a perspective view illustrating a non-pad area according toan embodiment of the invention;

FIG. 6E is a cross-sectional view illustrating a non-pad area accordingto an embodiment of the invention;

FIG. 6F is an enlarged cross-sectional view illustrating a first sealingmember according to an embodiment of the invention;

FIG. 6G is an enlarged cross-sectional view illustrating a secondsealing member according to an embodiment of the invention;

FIG. 7A is a perspective view illustrating a work display panelaccording to an embodiment of the invention;

FIG. 7B is a perspective view illustrating a first work displaysubstrate and a second work display substrate according to an embodimentof the invention;

FIG. 7C is a cross-sectional view illustrating cell areas of first andsecond work display substrates according to an embodiment of theinvention;

FIG. 7D is a cross-sectional view illustrating a work display panelaccording to an embodiment of the invention;

FIGS. 7E and 7F are cross-sectional views illustrating a preliminarydisplay panel according to an embodiment of the invention;

FIGS. 8 to 15 are cross-sectional views illustrating pad areas accordingto some embodiments of the invention; and

FIGS. 16A and 16B are plan views illustrating display panels accordingto some embodiments of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The invention now will be described more fully hereinafter withreference to the accompanying drawings, in which various embodiments areshown. This invention may, however, be embodied in many different forms,and should not be construed as limited to the embodiments set forthherein. Rather, these embodiments are provided so that this disclosurewill be thorough and complete, and will fully convey the scope of theinvention to those skilled in the art. Like reference numerals refer tolike elements throughout. It will be understood that when an elementsuch as a layer, region or substrate is referred to as being “on”another element, it can be directly on the other element or interveningelements may be present. In contrast, the term “directly” means thatthere are no intervening elements. As used herein, the term “and/or”includes any and all combinations of one or more of the associatedlisted items.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting. As used herein, thesingular forms “a,” “an,” and “the” are intended to include the pluralforms, including “at least one,” unless the content clearly indicatesotherwise. “Or” means “and/or.” It will be further understood that theterms “comprises” and/or “comprising,” or “includes” and/or “including”when used in this specification, specify the presence of statedfeatures, regions, integers, steps, operations, elements, and/orcomponents, but do not preclude the presence or addition of one or moreother features, regions, integers, steps, operations, elements,components, and/or groups thereof. It will be understood that, althoughthe terms first, second, etc. may be used herein to describe variouselements, components, regions, layers and/or sections, these elements,components, regions, layers and/or sections should not be limited bythese terms. These terms are only used to distinguish one element,component, region, layer or section from another region, layer orsection. Thus, a first element, component, region, layer or sectiondiscussed below could be termed a second element, component, region,layer or section without departing from the teachings herein.

Exemplary embodiments are described herein with reference tocross-sectional illustrations and/or plane illustrations that areidealized exemplary illustrations. In the drawings, the thicknesses oflayers and regions are exaggerated for clarity. Accordingly, variationsfrom the shapes of the illustrations as a result, for example, ofmanufacturing techniques and/or tolerances, are to be expected. Thus,exemplary embodiments should not be construed as limited to the shapesof regions illustrated herein but are to include deviations in shapesthat result, for example, from manufacturing. For example, an etchingregion illustrated as a rectangle will, typically, have rounded orcurved features. Thus, the regions illustrated in the figures areschematic in nature and their shapes are not intended to illustrate theactual shape of a region of a device and are not intended to limit thescope of exemplary embodiments.

FIG. 1 is a perspective view illustrating a display device DD accordingto an embodiment of the invention. FIG. 2 is a plan view illustratingthe display device DD according to an embodiment of the invention.

Referring to FIGS. 1 and 2, the display device DD includes a displaypanel DP, a gate driving unit GDC, a data driving unit DDC, a maincircuit board PB, and a signal controller SC. Even though not shown inthe drawings, the display device DD may further include a chassis memberor a molding member and may further include a backlight unit inaccordance with a kind of the display panel DP.

The display panel DP may be a liquid crystal display panel, a plasmadisplay panel, an electrophoretic display panel, amicroelectromechanical system (MEMS) display panel, an electrowettingdisplay panel, or an organic light emitting display panel. However, thedisplay panel DP is not limited to any specific kind of display panels.

The display panel DP may include a first display substrate 100 and asecond display substrate 200 facing the first display substrate 100. Thesecond display substrate 200 may be spaced apart from the first displaysubstrate 100. Even though not clearly shown in FIG. 1, a cell gap maybe formed between the first display substrate 100 and the second displaysubstrate 200. A gray scale display layer for generating an image may bedisposed between the first display substrate 100 and the second displaysubstrate 200. The gray scale display layer may be a display elementlayer such as a liquid crystal layer, an organic light emitting layer oran electrophoretic layer in accordance with a kind of the display panel.

As illustrated in FIG. 1, the display panel DP may display an imagethrough a display surface DP-IS. The display surface DP-IS is parallelto a plane defined by a first directional axis DR1 and a seconddirectional axis DR2. The display surface DP-IS may include a displayarea DA and a non-display area NDA. The non-display area NDA may bedefined along a border of the display surface DP-IS and may surround thedisplay area DA.

A normal direction of the display surface DP-IS (i.e., a thicknessdirection of the display panel DP) is indicated by a third directionalaxis DR3. Hereinafter, a front surface (or a top surface) and a rearsurface (or a bottom surface) of each of layers or units are defined bythe third directional axis DR3. However, the first to third directionalaxes DR1, DR2 and DR3 of the present embodiment are illustrated as anexample. However, directions indicated by the first to third directionalaxes DR1, DR2 and DR3 may be relative concepts, and relation thereof maybe defined differently from the present embodiment. Hereinafter, firstto third directions are the directions indicated by the first to thirddirectional axes DR1, DR2 and DR3, respectively, and are indicated bythe same reference designators as the first to third directional axesDR1, DR2 and DR3.

The display panel DP having the planar display surface DP-IS isillustrated in the present embodiment. However, embodiments of theinvention are not limited thereto. In other embodiments, the displaydevice DD may include a curved display surface or a three-dimensional(3D) display surface. The 3D display surface may include a plurality ofdisplay areas indicated by different directions.

The gate driving unit GDC and the data driving unit DDC may includecircuit boards GCB and DCB and driving chips GC and DC, respectively.Each of the circuit boards GCB and DCB has a structure in which aninsulating layer and a conductive layer are stacked. The conductivelayer may include a plurality of signal lines. The gate driving unit GDCand the data driving unit DDC may be coupled to a side surface of thedisplay panel DP so as to be electrically connected to signal lines ofthe display panel DP. Since the gate driving unit GDC and the datadriving unit DDC are coupled to the side surface of the display panelDP, the non-display area NDA may be reduced.

In FIG. 1, one of a plurality of the gate driving units GDC is separatedfrom the side surface of the display panel DP for the purpose of easeand convenience in description and illustration. A connection pad CP isdisposed on the side surface of the display panel DP, which is connectedto the gate driving unit GDC.

The connection pad CP may be provided in plurality to correspond to thecircuit board GCB. The connection pads CP may be spaced apart from eachother in the second direction DR2. The connection pad CP is connected toa pad (not shown) of the circuit board GCB.

A position and a shape of the connection pad CP may be also distributedon the side surface of the display panel DP, which is connected to thedata driving unit DDC. The connection pad CP may include metal paste.The metal paste includes a mixture of a metal and an insulatingmaterial. The connection pad CP may include silver paste.

Pad areas PDA and non-pad areas NPDA may be defined in the side surfaceor an edge of the display panel DP, to which the gate driving unit GDCand the data driving unit DDC are connected. The gate driving unit GDCand the data driving unit DDC may be connected to the pad areas PDA. Endportions of signal lines PL-G and PL-D may be disposed in the pad areasPDA. In the present embodiment, the gate driving unit GDC and the datadriving unit DDC are coupled to different side surfaces of the displaypanel DP. However, embodiments of the invention are not limited thereto.In another embodiment, the gate driving unit GDC and the data drivingunit DDC may be coupled to the same side surface of the display panelDP. In still another embodiment, the gate driving unit GDC may beintegrated on the display panel DP through an oxide silicon gate drivercircuit (OSG) process or an amorphous silicon gate driver circuit (ASG)process, and the data driving unit DDC may be coupled to the sidesurface of the display panel DP. Unlike the gate driving unit GDC andthe data driving unit DDC, only a circuit board may be connected to theside surface of the display panel DP.

The main circuit board PB may be connected to the circuit board DCB ofthe data driving unit DDC. The main circuit board PB may be electricallyconnected to the circuit board DCB of the data driving unit DDC throughan anisotropic conductive film (ACF) or solder balls. The signalcontroller SC may be mounted on the main circuit board PB. The signalcontroller SC receives image data and control signals from an externalgraphic controller (not shown). The signal controller SC may providecontrol signals to the gate driving unit GDC and the data driving unitDDC.

In an embodiment of the invention, the display device DD may furtherinclude a main circuit board connected to the circuit board GCB of thegate driving unit GDC. In an embodiment of the invention, the drivingchip DC of the data driving unit DDC may be mounted on the main circuitboard PB.

FIG. 2 illustrates planar arrangement of signal lines GL1 to GLn, DL1 toDLm, PL-G and PL-D and pixels PX11 to PXnm, which are included in thedisplay panel DP. The signal lines GL1 to GLn, DL1 to DLm, PL-G and PL-Dmay include a plurality of gate lines GL1 to GLn, a plurality of datalines DL1 to DLm, and auxiliary signal lines PL-G and PL-D.

The gate lines GL1 to GLn extend in the first direction DR1 and arearranged in the second direction DR2, and the data lines DL1 to DLm areinsulated from the gate lines GL1 to GLn and intersect the gate linesGL1 o GLn.

The gate lines GL1 to GLn and the data lines DL1 to DLm overlap with thedisplay area DA. The auxiliary signal lines PL-G and PL-D may overlapwith the non-display area NDA and may be connected to the gate lines GL1to GLn and the data lines DL1 to DLm.

First auxiliary signal lines PL-G connected to the gate lines GL1 to GLnmay be disposed on the same layer as the gate lines GL1 to GLn. Thefirst auxiliary signal line PL-G and the gate line connected to eachother may constitute a single unitary body. Second auxiliary signallines PL-D connected to the data lines DL1 to DLm may be disposed on alayer different from a layer on which the data lines DL1 to DLm aredisposed. Each of the data lines DL1 to DLm may be electricallyconnected to a corresponding one of the second auxiliary signal linesPL-D through a contact hole CH penetrating at least one insulating layerdisposed between the second auxiliary signal lines PL-D and the datalines DL1 to DLm. In FIG. 2, two contact holes CH are illustrated as anexample.

In an embodiment of the invention, the contact hole CH may be omitted,and the data lines DL1 to DLm and the second auxiliary signal lines PL-Dmay be disposed on the same layer. In the present embodiment, the gatelines GL1 to GLn and the first auxiliary signal lines PL-G aredistinguished from each other. However, in another embodiment, the gateline and the first auxiliary signal line connected to each other may bedefined as one signal line. In this case, the gate line and the firstauxiliary signal line connected to each other may be defined asdifferent portions of the one signal line.

The signal lines GL1 to GLn, DL1 to DLm, PL-G and PL-D may furtherinclude other signal lines. For example, a voltage supply line DVL mayfurther be included in the signal lines. The voltage supply line DVL mayreceive a DC voltage. The DC voltage may be a ground voltage. Thevoltage supply line DVL may overlap with the non-display area NDA andmay be disposed on the same layer as the data lines DL1 to DLm. Thevoltage supply line DVL may have a closed line shape (e.g., a closedloop shape) or an opened loop shape. In an embodiment, the voltagesupply line DVL may include portions disposed on different layers.

In addition, the signal lines may further include signal lines forelectrically connecting a plurality of the gate driving units GDC toeach other and signal lines for electrically connecting the plurality ofgate driving units GDC to the main circuit board PB.

Each of the pixels PX11 to PXnm is connected to a corresponding one ofthe plurality of gate lines GL1 to GLn and a corresponding one of theplurality of data lines DL1 to DLm. Each of the pixels PX11 to PXnm mayinclude a pixel driving circuit and a display element.

The pixels PX11 to PXnm arranged in a matrix form are illustrated as anexample in FIG. 2. However, embodiments of the invention are not limitedthereto. In another embodiment, the pixels PX11 to PXnm may be arrangedin a pentile form.

FIG. 3 is an equivalent circuit diagram of a pixel PXij according to anembodiment of the invention. The pixel PXij connected to an i^(th) gateline GLi and a j^(th) data line DLj is illustrated as an example in FIG.3. Hereinafter, a liquid crystal display panel will be described as anexample of the display panel DP.

The pixel PXij may include a thin film transistor TR (hereinafter,referred to as ‘a transistor’), a liquid crystal capacitor Clc, and astorage capacitor Cst. The liquid crystal capacitor Clc may correspondto the display element, and the transistor TR and the storage capacitorCst may constitute the pixel driving circuit. The numbers of thetransistor TR and the storage capacitor Cst may be changed depending onan operating mode of the liquid crystal display panel. In anotherembodiment, the storage capacitor Cst may be omitted.

The liquid crystal capacitor Clc may store a pixel voltage outputtedfrom the transistor TR. Arrangement of liquid crystal directors includedin a liquid crystal layer LCL (shown in at least FIGS. 5A to 5C) may bechanged depending on the amount of charges stored in the liquid crystalcapacitor Clc. In other words, the liquid crystal directors may becontrolled by an electric field formed between two electrodes of theliquid crystal capacitor Clc. Light incident to the liquid crystal layerLCL may be transmitted or blocked according to the arrangement of theliquid crystal directors.

The storage capacitor Cst is connected in parallel to the liquid crystalcapacitor Clc. The storage capacitor Cst maintains the arrangement ofthe liquid crystal directors for a certain period.

FIG. 4 is a perspective view illustrating the display area DA of thedisplay panel DP according to an embodiment of the invention. FIGS. 5Ato 5C are cross-sectional views illustrating display areas DA of displaypanels DP according to some embodiments of the invention.

FIG. 4 illustrates a central portion of the display area DA. The displayarea DA may include pixel areas PXA and a peripheral area NPXA. Theperipheral area NPXA may surround each of the pixel areas PXA and maycorrespond to a boundary area between the pixel areas PXA. The pixelareas PXA may be arranged in the same form as the pixels PX11 to PXnm(see FIG. 2).

The pixel areas PXA may correspond to areas that substantially displaycolors. The pixel areas PXA may correspond to transmission areas in atransmission-type display panel or may correspond to light emittingareas in a light emitting type display panel. The pixel areas PXA may beclassified into a plurality of groups on the basis of colors displayedby the pixel areas PXA. In other words, each of the pixel areas PXA maydisplay one of primary colors. The primary colors may include a redcolor, a green color, a blue color, and a white color.

A cell gap GP is defined between the first display substrate 100 and thesecond display substrate 200. The signal lines GL1 to GLn, DL1 to DLm,PL-G and PL-D described with reference to FIG. 2 may be included in oneof the first display substrate 100 and the second display substrate 200.The pixels PX11 to PXnm may be included in one of the first displaysubstrate 100 and the second display substrate 200. Alternatively, somecomponents of the pixels PX11 to PXnm may be included in the firstdisplay substrate 100, and other components of the pixel PX11 to PXnmmay be included in the second display substrate 200. The pixels PX11 toPXnm may be disposed between a base substrate of the first displaysubstrate 100 and a base substrate of the second display substrate 200.

FIGS. 5A to 5C illustrates cross-sectional views corresponding to pixelsPXij of liquid crystal display panels of different modes.

As illustrated in FIGS. 5A to 5C, the transistor TR includes a controlelectrode GE connected to the i^(th) gate line GLi, an active part ALoverlapping with the control electrode GE, an input electrode SEconnected to the j^(th) data line DLi, and an output electrode DE spacedapart from the input electrode SE.

The liquid crystal capacitor Clc includes a pixel electrode PE and acommon electrode CE. The storage capacitor Cst includes the pixelelectrode PE and a portion of a storage line STL overlapping with thepixel electrode PE.

The i^(th) gate line GLi and the storage line STL are disposed on onesurface of a first base substrate BS1 of the first display substrate100. The control electrode GE is branched from the i^(th) gate line GLi.The i^(th) gate line GLi and the storage line STL may include a metal(e.g., aluminum (Al), silver (Ag), copper (Cu), molybdenum (Mo),chromium (Cr), tantalum (Ta), or titanium (Ti)) or any alloy thereof. Inan embodiment, the i^(th) gate line GLi and the storage line STL mayhave a multi-layered structure (e.g., a titanium layer and a copperlayer).

The first base substrate BS1 may be a glass substrate or a plasticsubstrate. A first insulating layer 10 may be disposed on the onesurface of the first base substrate BS1 and may cover the controlelectrode GE and the storage line STL. The first insulating layer 10 mayinclude at least one of an inorganic material or an organic material.For example, the first insulating layer 10 may include a silicon nitridelayer, a silicon oxynitride layer, a silicon oxide layer, a titaniumoxide layer, or an aluminum oxide layer. In an embodiment, the firstinsulating layer 10 may include a multi-layered structure (e.g., asilicon nitride layer and a silicon oxide layer).

The active part AL overlapping with the control electrode GE is disposedon the first insulating layer 10. The active part AL may include asemiconductor layer SCL and an ohmic contact layer OCL. Thesemiconductor layer SCL is disposed on the first insulating layer 10,and the ohmic contact layer OCL is disposed on the semiconductor layerSCL.

The semiconductor layer SCL may include amorphous silicon orpoly-silicon. Alternatively, the semiconductor layer SCL may include ametal oxide semiconductor. The ohmic contact layer OCL may be doped withdopants. A concentration of the dopants in the ohmic contact layer OCLmay be higher than a concentration of dopants in the semiconductor layerSCL. The ohmic contact layer OCL may include two portions spaced apartfrom each other. In an embodiment of the invention, the ohmic contactlayer OCL may have a shape of one body.

The output electrode DE and the input electrode SE are disposed on theactive part AL. The output electrode DE and the input electrode SE arespaced apart from each other. Each of the output electrode DE and theinput electrode SE partially overlaps with the control electrode GE.

A second insulating layer 20 is disposed on the first insulating layer10 and covers the active part AL, the output electrode DE, and the inputelectrode SE. The second insulating layer 20 may include at least one ofan inorganic material or an organic material. For example, the secondinsulating layer 20 may include a silicon nitride layer, a siliconoxynitride layer, a silicon oxide layer, a titanium oxide layer, or analuminum oxide layer. In an embodiment, the second insulating layer 20may include a multi-layered structure (e.g., a silicon nitride layer anda silicon oxide layer).

The transistor TR having a staggered structure is illustrated as anexample in FIGS. 5A to 5C. However, the structure of the transistor TRis not limited thereto. In another embodiment, the transistor TR mayhave a planar structure.

A third insulating layer 30 is disposed on the second insulating layer20. The third insulating layer 30 may be a single-layered organic layerproviding a flat surface. In the present embodiment, the thirdinsulating layer 30 may include a plurality of color filters. The colorfilter may completely cover at least pixel area PXA (see FIG. 4). Thecolor filters of adjacent pixels may partially overlap with each otherin the peripheral area NPXA.

A fourth insulating layer 40 is disposed on the third insulating layer30. The fourth insulating layer 40 may be an inorganic layer coveringthe color filters. For example, the fourth insulating layer 40 mayinclude a silicon nitride layer, a silicon oxynitride layer, a siliconoxide layer, a titanium oxide layer, or an aluminum oxide layer. In anembodiment, the fourth insulating layer 40 may include a multi-layeredstructure (e.g., a silicon nitride layer and a silicon oxide layer).

As illustrated in FIG. 5A, the pixel electrode PE may be disposed on thefourth insulating layer 40. The pixel electrode PE may be connected tothe output electrode DE through a contact hole CH10 penetrating thesecond, third and fourth insulating layers 20, 30 and 40. An alignmentlayer (not shown) covering the pixel electrode PE may be disposed on thefourth insulating layer 40.

A second base substrate BS2 of the second display substrate 200 may be aglass substrate or a plastic substrate. A black matrix layer BM isdisposed on a bottom surface of the second base substrate BS2. The blackmatrix layer BM may have a shape corresponding to the peripheral areaNPXA (see FIG. 4). In other words, openings corresponding to the pixelareas PXA may be defined in the black matrix layer BM.

At least one insulating layer covering the black matrix layer BM may bedisposed on the bottom surface of the second base substrate BS2. In FIG.5A, a fifth insulating layer 50 providing a flat surface is illustratedas an example on the bottom surface of the second base substrate BS2.The fifth insulating layer 50 may include an organic material.

As illustrated in FIG. 5A, the common electrode CE may be disposed onthe bottom surface of the second base substrate BS2. A common voltage isapplied to the common electrode CE. A value of the common voltage isdifferent from that of the pixel voltage.

However, the cross section of the pixel PXij in FIG. 5A is illustratedas an example of the invention. In another embodiment, the first displaysubstrate 100 and the second display substrate 200 may be turned over inthe third direction DR3. In still another embodiment, the color filtersmay be disposed on the second display substrate 200.

The liquid crystal display panel of a vertical alignment (VA) mode isdescribed as an example with reference to FIG. 5A. However, embodimentsof the invention are not limited thereto. In other embodiments, thedisplay panel DP may be a liquid crystal display panel of an in-planeswitching (IPS) mode, a fringe-field switching (FFS) mode, aplane-to-line switching (PLS) mode, a super vertical alignment (SVA)mode, or a surface-stabilized vertical alignment (SS-VA) mode.

The liquid crystal display panel of the in-plane switching (IPS) mode isillustrated in FIG. 5B, and the liquid crystal display panel of theplane-to-line switching (PLS) mode is illustrated in FIG. 5C. Asillustrated in FIG. 5B, the pixel electrode PE and the common electrodeCE may be disposed on the same layer in the liquid crystal display panelof the in-plane switching (IPS) mode. Each of the pixel electrode PE andthe common electrode CE may include a plurality of branch portions. Thebranch portions of the pixel electrode PE and the branch portions of thecommon electrode CE may be alternately arranged. The common electrode CEmay be connected to a signal line (e.g., the storage line STL), whichreceives the common voltage, through a contact hole CH20.

As illustrated in FIG. 5C, in the liquid crystal display panel of theplane-to-line switching (PLS) mode, the pixel electrode PE and thecommon electrode CE may be disposed with a sixth insulating layer 60interposed therebetween. The pixel electrode PE may include a pluralityof branch portions or may include a plurality of slits. Positions of thepixel electrode PE and the common electrode CE may be exchanged witheach other.

As illustrated in FIGS. 5A to 5C, a spacer CS may be disposed betweenthe first display substrate 100 and the second display substrate 200.The spacer CS maintains the cell gap GP. The spacer CS may include aphotosensitive organic material. The spacer CS overlaps with theperipheral area NPXA. The spacer CS may overlap with the transistor TR.The first to fourth insulating layers 10, 20, 30 and 40 illustrated inFIGS. 5A to 5C may be changed or modified. For example, an insulatinglayer may be additionally provided, or one or some of the insulatinglayers 10, 20, 30 and 40 may be omitted.

FIG. 6A is a plan view illustrating a display panel DP according to anembodiment of the invention. FIG. 6B is a perspective view illustratinga pad area PDA according to an embodiment of the invention. FIG. 6C is across-sectional view illustrating the pad area PDA according to anembodiment of the invention. FIG. 6D is a perspective view illustratinga non-pad area NPDA according to an embodiment of the invention. FIG. 6Eis a cross-sectional view illustrating the non-pad area NPDA accordingto an embodiment of the invention. FIG. 6F is an enlargedcross-sectional view illustrating a first sealing member SS1 accordingto an embodiment of the invention. FIG. 6G is an enlargedcross-sectional view illustrating a second sealing member SS2 accordingto an embodiment of the invention.

Planar shapes of the first and second sealing members SS1 and SS2 areillustrated in FIG. 6A. At least one of the first sealing member SS1 orthe second sealing member SS2 may have a closed line shape (e.g., aclosed loop shape) when viewed in a plan view. The first sealing memberSS1 and the second sealing member SS2 may be spaced apart from eachother. In particular, the first sealing member SS1 may be formed on anouter perimeter of the display panel and the second sealing member SS2may be formed inside the outer perimeter of the display panel. The firstsealing member SS1 and the second sealing member SS2 are disposedbetween the first display substrate 100 and the second display substrate200 to form the cell gap GP.

The first and second sealing members SS1 and SS2, each of which has theclosed line shape, are illustrated as an example in FIG. 6A. The secondsealing member SS2 is disposed inside the first sealing member SS1 whenviewed in a plan view. The second sealing member SS2 may overlap withthe voltage supply line DVL illustrated in FIG. 2.

The first sealing member SS1 and the second sealing member SS2 areformed in the non-display area NDA. The first sealing member SS1 may bedisposed along an edge or a perimeter of the display panel DP whenviewed in a plan view. In other words, a side surface of the firstsealing member SS1 may form a portion of the side surface of the displaypanel DP. The liquid crystal layer LCL (see FIG. 6C) may be disposed inan inner space of the cell gap GP, which is defined by the secondsealing member SS2.

FIGS. 6B and 6C illustrate one pad area PDA of FIG. 6A in detail. Asillustrated in FIGS. 6B and 6C, an end portion PL-GE of the auxiliarysignal line PL-G overlaps with the pad area PDA. The end portion PL-GEof the auxiliary signal line PL-G may be a portion of the auxiliarysignal line PL-G and may be defined as a portion of the auxiliary signalline PL-G, which overlaps with the first sealing member SS1. In certainembodiments, the end portion PL-GE may be defined as the whole or a partof the portion, overlapping with the first sealing member SS1, of theauxiliary signal line PL-G.

A side surface PL-GS of the auxiliary signal line PL-G (e.g., a sidesurface PL-GS of the end portion PL-GE of the auxiliary signal linePL-G) may be substantially aligned with a side surface BS1-S of thefirst base substrate BS1. A side surface SS1-S of the first sealingmember SS1 may be substantially aligned with the side surface BS1-S ofthe first base substrate BS1. The side surface BS1-S of the first basesubstrate BS1 may be substantially aligned with a side surface BS2-S ofthe second base substrate BS2.

The connection pad CP is disposed on the side surface of the displaypanel DP. In more detail, the connection pad CP may be coupled to atleast the side surface BS1-S of the first base substrate BS1, the sidesurface SS1-S of the first sealing member SS1 and the side surface BS2-Sof the second base substrate BS2. In an embodiment, a length of theconnection pad CP in the third direction DR3 may be adjusted such thatthe connection pad CP may not be in contact with the side surface BS2-Sof the second base substrate BS2.

The connection pad CP is connected to the end portion PL-GE of theauxiliary signal line PL-G. The connection pad CP may be provided inplurality, and the connection pads CP may be connected to the sidesurfaces PL-GS of the end portions PL-GE in one-to-one correspondence.The connection pad CP may be electrically connected to a pad GCB-P ofthe circuit board GCB through an anisotropic conductive film (ACF). Theanisotropic conductive film (ACF) may be replaced with solder paste, andthe connection pad CP may be connected directly to the pad GCB-P of thecircuit board GCB.

Since the connection pad CP is disposed on the side surface of thedisplay panel DP, the circuit board GCB may be connected to the sidesurface of the display panel DP. In other words, a connection area ofthe circuit board GCB and the display panel DP may be defined on theside surface of the display panel DP, and thus an area of thenon-display area NDA may be reduced.

FIGS. 6D and 6E illustrate one non-pad area NPDA of FIG. 6A in detail. Asignal line (e.g., the auxiliary signal line PL-G) is not disposed inthe non-pad area PDA, as compared with the pad area PDA. The signal linedoes not overlap with a portion of the first sealing member SS1, whichis disposed in the non-pad area NPDA.

An end portion of the common electrode CE may overlap with the firstsealing member SS1. The side surface SS1-S of the first sealing memberSS1 may be substantially aligned with the side surface BS1-S of thefirst base substrate BS1 and the side surface BS2-S of the second basesubstrate BS2 in each of the non-pad area NPDA and the pad area PDA.Thus, the first sealing member SS1 may firmly support an edge area ofthe display panel DP in a plan view.

The first sealing member SS1 may be a non-conductive sealing member, andthe second sealing member SS2 may be a conductive sealing member. Asillustrated in FIG. 6F, the first sealing member SS1 may include a firstsynthetic resin PM1 and first inorganic fillers IP1 mixed with the firstsynthetic resin PM1. The first inorganic fillers IP1 may improve ahardness of the first sealing member SS1.

The first synthetic resin PM1 may include an acrylic epoxy-based resin.The first inorganic fillers IP1 may include a silica-based inorganicmaterial. In an embodiment, the first inorganic fillers IP1 may includetwo different kinds of inorganic fillers. The first synthetic resin PM1may further include other additive(s). The additives may include anamine-based hardener and a photo initiator. The additives may furtherinclude a silane-based additive and an acrylic-based additive.

As illustrated in FIG. 6G, the second sealing member SS2 may include asecond synthetic resin PM2, second inorganic fillers IP2 mixed with thesecond synthetic resin PM2, and conductive particles CPS mixed with thesecond synthetic resin PM2. The conductive particles CPS electricallyconnect the voltage supply line DVL to the common electrode CE. In theembodiment of FIG. 6G, the voltage supply line DVL may be disposed onthe first insulating layer 10 and may be formed by the same process asthe input electrode SE (see FIG. 5A). Alternatively, the voltage supplyline DVL may be disposed on a layer different from the first insulatinglayer 10.

The second synthetic resin PM2 may include the same material as thefirst synthetic resin PM1, and the second inorganic fillers IP2 mayinclude the same material as the first inorganic fillers IP1. Theconductive particles CPS may include gold particles and/or nickelparticles. Diameters (e.g., an average diameter) of the conductiveparticles CPS may be less than diameters (e.g., an average diameter) ofthe first inorganic fillers IP1 and diameters (e.g., an averagediameter) of the second inorganic fillers IP2.

A weight % of the second inorganic fillers IP2 with respect to thesecond sealing member SS2 may be less than a weight % of the firstinorganic fillers IP1 with respect to the first sealing member SS1. Afirst mixture and a synthetic resin for the first sealing member SS1 maybe mixed with a second mixture including metal particles to form amixture for the second sealing member SS2. In an embodiment, the secondinorganic fillers IP2 of the second sealing member SS2 may be omitted.

FIG. 7A is a perspective view illustrating a work display panel DP-Waccording to an embodiment of the invention. FIG. 7B is a perspectiveview illustrating a first work display substrate 100-W and a second workdisplay substrate 200-W according to an embodiment of the invention.FIG. 7C is a cross-sectional view illustrating cell areas CA1 and CA2 offirst and second work display substrates 100-W and 200-W according to anembodiment of the invention. FIG. 7D is a cross-sectional viewillustrating a work display panel DP-W according to an embodiment of theinvention. FIGS. 7E and 7F are cross-sectional views illustrating apreliminary display panel DP-P according to an embodiment of theinvention.

As illustrated in FIG. 7A, the same process may be performed on aplurality of cell areas CA defined in the work display panel DP-W toform the display panel DP (see FIGS. 1 to 6G) in each of the cell areasCA. The cell areas CA are divided by a boundary area BA. The first workdisplay substrate 100-W and the second work display substrate 200-W arecoupled to each other to form the work display panel DP-W. Asillustrated in FIG. 7B, the first work display substrate 100-W mayinclude first cell areas CA1 corresponding to the cell areas CA and afirst boundary area BA1 corresponding to the boundary area BA. Thesecond work display substrate 200-W may include second cell areas CA2corresponding to the cell areas CA and a second boundary area BA2corresponding to the boundary area BA.

The first cell area CA1 may correspond to the first display substrate100 described with reference to FIGS. 1 to 6G, and the second cell areaCA2 may correspond to the second display substrate 200 described withreference to FIGS. 1 to 6G.

A first sealing member SS1 and a second sealing member SS2 are formed inone of the first cell area CA1 and the second cell area CA2, and aliquid crystal composition LC-C is provided in the other of the firstcell area CA1 and the second cell area CA2. At this time, the firstsealing member SS1 and the second sealing member SS2 are in anunhardened state.

As illustrated in FIGS. 7B and 7C, the first sealing member SS1 and thesecond sealing member SS2 may be formed on the first cell area CA1 ofthe first work display substrate 100-W. At this time, a height H1 of thefirst sealing member SS1 may be equal to or greater than a height H2 ofthe second sealing member SS2. Thus, a pressure applied to the firstsealing member SS1 may be greater than a pressure applied to the secondsealing member SS2 when the first work display substrate 100-W iscoupled to the second work display substrate 200-W. The height H1 of thefirst sealing member SS1 may be 5% to 20% (in particular, 10% to 20%)greater than the height H2 of the second sealing member SS2.

After the first work display substrate 100-W is coupled to the secondwork display substrate 200-W, the work display panel DP-W may be cut toform preliminary display panels DP-P (see FIG. 7E). As illustrated inFIG. 7D, a structure extending from structures of the cell areas CA maybe disposed in the boundary area BA of the work display panel DP-W. Thework display panel DP-W may be cut along a cutting line CL illustratedin FIG. 7D by, for example, a scribing process to separate thepreliminary display panels DP-P respectively formed in the cell areasCA. Since the first sealing members SS1 of the cell areas CA do notoverlap with the cutting line CL, the first sealing members SS1 are notdamaged by the cutting process.

A side surface of the preliminary display panel DP-P of FIG. 7E is in anon-uniform state, as compared with the side surface of the displaypanel DP of FIG. 6C. The side surface of the preliminary display panelDP-P is ground using a grinder GM (a grinding process). A side surfaceof the first display substrate 100, a side surface of the second displaysubstrate 200 and a side surface of the first sealing member SS1 may besubstantially aligned with each other by the grinding process, asillustrated in FIG. 7F.

A cross-sectional shape of the auxiliary signal line PL-G may be changeddepending on a grinding method (e.g., a rotational direction of thegrinder GM). However, the side surface of the auxiliary signal line PL-Gand the side surface of the first base substrate BS1 may besubstantially aligned with each other regardless of the grinding method.In the present specification, the term “substantial alignment” mayinclude a case in which the side surfaces of the first sealing memberSS1, the auxiliary signal line PL-G and the first and second basesubstrates BS1 and BS2 constitute one surface. In addition, the term“substantial alignment” may also include variations as a result ofmanufacturing techniques and/or process tolerances. For example, theside surface of the auxiliary signal line PL-G may have a fine curvedsurface formed by the grinder GM. A corner defining the curved sidesurface of the auxiliary signal line PL-G may be aligned with a cornerdefining a side surface of an insulating structure.

The first sealing member SS1 maintains tension between the first displaysubstrate 100 and the second display substrate 200 to prevent theinsulating layers 10, 20, 40 and 50 of the first and second displaysubstrates 100 and 200 and/or the auxiliary signal line PL-G from beingdamaged in the grinding process. The first sealing member SS1 supportsthe first display substrate 100 and the second display substrate 200 toprevent the side surface of the display panel DP from being damaged ordeformed by friction of the grinder GM.

Even though not shown in the drawings, connection pads CP may be formedon the side surface of the display panel DP after the grinding process.Metal paste may be printed on the side surface of the display panel DP,and then, a laser patterning process may be performed on the metal pasteto form the connection pads CP corresponding to the auxiliary signallines PL-G, respectively. After the formation of the connection pads CP,a process of connecting the circuit boards GCB and DCB to the connectionpads CP may be performed.

FIGS. 8 to 15 are cross-sectional views illustrating pad areas PDAaccording to some embodiments of the invention. FIGS. 8 to 15 illustratecross-sectional views corresponding to FIG. 6C. Hereinafter, thedetailed descriptions to the same components as in the embodiments ofFIGS. 1 to 7E will be omitted for the purpose of ease and convenience indescription.

As illustrated in FIG. 8, the display panel DP may further include anauxiliary electrode SBE. The auxiliary electrode SBE overlaps with theauxiliary signal line PL-G and the first sealing member SS1. Theauxiliary electrode SBE may be disposed on the first insulating layer 10and may be formed through the same process as the input electrode SE ofFIG. 5A. A plurality of the auxiliary electrodes SBE may correspond tothe auxiliary signal lines PL-G in one-to-one correspondence or oneauxiliary electrode SBE may overlap with a plurality of the auxiliarysignal lines PL-G.

A side surface of the auxiliary electrode SBE may be aligned with theside surface of the first base substrate BS1. The connection pad CP maybe in contact with the side surface of the auxiliary electrode SBE. Theauxiliary electrode SBE may be disposed on the auxiliary signal linePL-G to withstand stress applied to the auxiliary signal line PL-G inthe grinding process, and thus damage/deformation of the auxiliarysignal line PL-G may be prevented.

As illustrated in FIG. 9, the auxiliary electrode SBE may be connectedto the end portion PL-GE of the auxiliary signal line PL-G. A portion ofthe first insulating layer 10 may be removed. Removed areas of the firstinsulating layer 10 may correspond to the auxiliary signal lines PL-G inone-to-one correspondence or one removed area may overlap with aplurality of the auxiliary signal lines PL-G. An electrical connectionarea between the connection pad CP and the auxiliary signal line PL-Gmay be increased by the auxiliary electrode SBE, and thus a contactresistance between the connection pad CP and the auxiliary signal linePL-G may be reduced.

As illustrated in FIG. 10, the display panel DP may further include athird insulating layer 30 overlapping with the non-display area NDA. Inthe present embodiment, the third insulating layer 30 may be a colorfilter 30. A color of the color filter 30 may be a red color, a greencolor, or a blue color. The color filter 30 may be formed by the sameprocess as the color filter (e.g., the third insulating layer 30) of thepixel area PXA (see FIG. 5A). The color filter 30 may have a line shapeoverlapping with the pad areas PDA (see FIG. 6A) and the non-pad areasNPDA (see FIG. 6A) when viewed in a plan view. Since the color filter 30is disposed, heights of the first and second sealing members SS1 and SS2may be reduced.

In another embodiment, the color filter 30 may overlap with only one ofthe first and second sealing members SS1 and SS2. Thus, the height ofthe one of the first and second sealing members SS1 and SS2 may bereduced.

As illustrated in FIG. 11, a thickness Th1 of the end portion PL-GE ofthe auxiliary signal line PL-G may be greater than a thickness Th2 of aninner portion, not overlapping with the first sealing member SS1, of theauxiliary signal line PL-G. This is because the end portion PL-GE isdeformed by the friction of the grinder GM in the grinding processillustrated in FIG. 7E.

As illustrated in FIGS. 12 and 13, the end portion PL-GE of theauxiliary signal line PL-G may be partially spaced apart from a topsurface of the first base substrate BS1. This is because stress isapplied to the end portion PL-GE of the auxiliary signal line PL-G bythe grinder GM in the grinding process illustrated in FIG. 7E.

As illustrated in FIG. 12, conductive sludge CSG may be disposed betweenthe end portion PL-GE of the auxiliary signal line PL-G and a portion ofthe top surface of the first base substrate BS1, from which the endportion PL-GE of the auxiliary signal line PL-G is spaced apart. Theconductive sludge CSG may include a ground material of the auxiliarysignal line PL-G and a ground material of the first base substrate BS1.The conductive sludge CSG may further include a ground material of thefirst insulating layer 10.

As illustrated in FIG. 13, a portion of the connection pad CP may bedisposed between the end portion PL-GE of the auxiliary signal line PL-Gand the portion of the top surface of the first base substrate BS1, fromwhich the end portion PL-GE of the auxiliary signal line PL-G is spacedapart. The conductive paste may be inserted into a space between the endportion PL-GE and the first base substrate BS1 in the process ofprinting the conductive paste.

As illustrated in FIG. 14, the first sealing member SS1 and the secondsealing member SS2 may be in contact with each other. When a distancebetween the first and second sealing members SS1 and SS2 is designed tobe narrow in the process of forming the first and second sealing membersSS1 and SS2 in FIG. 7C, shapes of the first and second sealing membersSS1 and SS2 may be deformed in the process of coupling the first workdisplay substrate 100-W to the second work display substrate 200-W.Thus, the first and second sealing members SS1 and SS2 may be in contactwith each other.

As illustrated in FIG. 15, the common electrode CE may not be disposedbetween the first sealing member SS1 and an insulating layer (e.g., thefifth insulating layer 50) of the second display substrate 200. An edgeof the common electrode CE may be disposed inside the first sealingmember SS1 in a plan view and may not overlap with the first sealingmember SS1.

FIGS. 16A and 16B are plan views illustrating display panels DPaccording to some embodiments of the invention. FIGS. 16A and 16Billustrate plan views corresponding to FIG. 6A.

As illustrated in FIG. 16A, a second sealing member may include aplurality of portions SS2-P spaced apart from each other. At least oneof the portions SS2-P may have the same cross-sectional shape asillustrated in FIG. 6G. That is, the second sealing member does not haveto form a closed loop but can be formed by portions SS2-P to form a looparound a perimeter of the display panel inside the outer perimeter ofthe display panel. Meanwhile, the first sealing member SS1 may form aclosed perimeter around the display panel.

As illustrated in FIG. 16B, a first sealing member may include aplurality of portions SS1-P spaced apart from each other. The portionsSS1-P may overlap with at least the non-pad areas NPDA. That is, thefirst sealing member does not have to form a closed loop but can beformed by portions SS1-P to form a loop around the outer perimeter ofthe display panel. Meanwhile, the second sealing member SS2 may form aclosed perimeter around the display panel.

According to the above descriptions, the connection pad may be disposedon the side surface of the display panel, and thus the circuit board maybe connected to the side surface of the display panel. Since aconnection area of the circuit board and the display panel is defined onthe side surface of the display panel, an area of the non-display areamay be reduced.

The non-conductive sealing member may be disposed outside the conductivesealing member in a plan view, and thus an edge area of the first andsecond display substrates may be firmly supported by the non-conductivesealing member. The non-conductive sealing member may maintain tensionbetween the first and second display substrates to prevent theinsulating layers of the first and second display substrates and/or thesignal line from being damaged in a fabrication process (e.g., thegrinding process). A contact area defined on the side surface of thesignal line may be secured to reduce a contact resistance between thecircuit board and the display panel.

While the invention has been described with reference to exampleembodiments, it will be apparent to those skilled in the art thatvarious changes and modifications may be made without departing from thespirits and scopes of the invention. Therefore, it should be understoodthat the above embodiments are not limiting, but illustrative. Thus, thescopes of the invention are to be determined by the broadest permissibleinterpretation of the following claims and their equivalents, and shallnot be restricted or limited by the foregoing description.

What is claimed is:
 1. A display panel comprising: a first displaysubstrate; a second display substrate facing and spaced apart from thefirst display substrate; a non-conductive sealing member disposedbetween the first display substrate and the second display substrate; aconductive sealing member disposed between the first display substrateand the second display substrate and disposed inside the non-conductivesealing member when viewed in a plan view; and a connection pad coupledto the non-conductive sealing member, wherein the first displaysubstrate comprises: a first base substrate; a signal line disposed onthe first base substrate connected to the connection pad; and a voltagesupply line disposed on the first base substrate and connected to theconductive sealing member.
 2. The display panel of claim 1, wherein thenon-conductive sealing member comprises: a first synthetic resin; andfirst inorganic fillers mixed with the first synthetic resin.
 3. Thedisplay panel of claim 2, wherein the conductive sealing membercomprises: a second synthetic resin; and conductive particles mixed withthe second synthetic resin.
 4. The display panel of claim 3, wherein theconductive sealing member further comprises second inorganic fillersmixed with the second synthetic resin.
 5. The display panel of claim 3,wherein a diameter of the conductive particles is less than a diameterof the first inorganic fillers.
 6. The display panel of claim 1, whereina side surface of the non-conductive sealing member is substantiallyaligned with a side surface of the first base substrate.
 7. The displaypanel of claim 1, wherein a side surface of the end portion of thesignal line is substantially aligned with a side surface of the firstbase substrate.
 8. The display panel of claim 1, wherein the seconddisplay substrate comprises a second base substrate and a commonelectrode disposed on one surface of the second base substrate, andwherein the non-conductive sealing member and the conductive sealingmember are connected to the common electrode.
 9. The display panel ofclaim 1, wherein the first display substrate further comprises a thinfilm transistor comprises a control electrode, an active part, and aninput electrode and an output electrode disposed on a layer differentfrom a layer on which the control electrode is disposed, and wherein thevoltage supply line is disposed on the same layer as the controlelectrode or the input electrode.
 10. The display panel of claim 9,further comprising: an auxiliary electrode overlapping with the endportion of the signal line, and wherein the signal line is disposed onthe same layer as the control electrode.
 11. The display panel of claim10, wherein the auxiliary electrode is disposed on the same layer as theinput electrode.
 12. The display panel of claim 10, wherein theauxiliary electrode is connected to the end portion of the signal line.13. The display panel of claim 1, wherein a thickness of the end portionof the signal line is greater than a thickness of the signal line notoverlapping with the non-conductive sealing member.
 14. The displaypanel of claim 1, wherein the end portion of the signal line is spacedapart from a top surface of the first base substrate.
 15. The displaypanel of claim 14, wherein conductive sludge is disposed between the endportion of the signal line and a portion of the top surface of the firstbase substrate, from which the end portion of the signal line is spacedapart.
 16. The display panel of claim 1, wherein at least one of thenon-conductive sealing member or the conductive sealing member forms aclosed perimeter around the display panel when viewed in a plan view.17. A display panel comprising: a first display substrate; a seconddisplay substrate facing and spaced apart from the first displaysubstrate; a non-conductive sealing member disposed between the firstdisplay substrate and the second display substrate; and a connection padcoupled to the non-conductive sealing member, wherein the first displaysubstrate comprises: a first base substrate including a side surfacesubstantially aligned with the side surface of the non-conductivesealing member; and a signal line disposed on a top surface of the firstbase substrate, wherein the signal line includes: an end portionoverlapping with the non-conductive sealing member and connected to theconnection pad; and an auxiliary electrode connected to the end portionof the signal line and the connection pad.
 18. The display panel ofclaim 17, wherein the non-conductive sealing member comprises: a firstsynthetic resin; and first inorganic fillers mixed with the firstsynthetic resin.
 19. The display panel of claim 18, further comprising aconductive sealing member disposed between the first display substrateand the second display substrate, wherein the conductive sealing membercomprises a second synthetic resin and conductive particles mixed withthe second synthetic resin.
 20. The display panel of claim 19, whereinthe conductive sealing member further comprises second inorganic fillersmixed with the second synthetic resin.